Improvement in mine-pumps



2 Sheets-Sheet 2.

E. DAGGETT.

Eatented 31.113717, 18'7'7.

Ine/awr..

N, PETERS, PHOTO-L'ITMOGRAPHER. wAsHxNGToN, D C.

tent, anyneces'sity for the well-known sothereby causing the column ofwater to wholly lvide"d"vvith vastufling-box'in its bottom, with of myinvention. "'Figs. 3, 4, 5, and 6 repre- UNITED STATES I vE LLswoRTHDAGGETT, or sALT LAKE CITY, UTAH TERRITORY.

|MPRovEMENT IVN MINE-PUMPS. y

Specification forming part of Letters Patent No. 193,227, dated July 17,1877 application filed May5,1877.5 i i CASE A.

To all 'whom it may concern:

B ef it known' that LELLswoRTH DAGGETT, of :Salt Lake City, in thecounty of Salt Lake and' Territory of Utah, mining' engineer, haveinvented certain newV and useful Improvements in Mine-Pumps; and I dohereby deelare that the following specification, taken in connection"Vvfv'ith'the drawings furnished and forming a p'art'of the same, is aclear, true, and complete description thereof.

My improvements relates to that class of pumps in which reciprocatingpipes are employed.

The main object of my invention is to obviate,'either"wholly 'or to aconsiderable excalled balance-bobs, (such as are employed in Cornishpumps,) for the purpose of balancing the' weight of the pipe during itslift; and to that end'my invention consists in the combination, withvtheV pump and its pipe, of an auxiliaryV or water-balance chamber, intowhich a portion of the water contained in the pipe is received duringits upward movement,

balance the weight ofthe pipe, vorl balance any desired lesser portionthereof.

' lAnother object of my invention is to eiect an easy and free dischargeof water from the reciprocating pipe, andv at the same time, when suchis'desirable, to provide for a direct connection with: the topof saidpipe, of the pitr'nan', by which it is connected with the operativemechanism and to' these ends my invention further consists of thecombination of a stationary'receiving and discharging tank, pro

al longitudinally-reciprocatin'g pipe, through which the water is forcedor'lifted and discharged'into the tank.

' To more particularly describe my invention, I willrefer to the"accompanying drawings, in Which- Figures 1 and 2 represent, in verticalsec tion, a pumpembodying the several features sent, in similarsections, modications o'fpumps embodying the water-balance feature of myinvention.

In all the figures, A represents the pumpthe other, at proper intervals,provided several pipes, B, areso connected -that all of them will bereciprocated as one pipe, as is described in anotherapplication by mefor Letters Patent. '4 f The construction of the pumpbarrel may belargely varied, and although I have herein in this. connection .shownand described certain details in construction which are novel and ofvalue, they constitute no portion of the invention which I at this timedesire to claim.

In Fig. 1 the pump-barrel isy shown to be constructed in two parts, vthelower being of a greater diameter than the upper. The upper portion isshown to be of considerable thickness, as at a,for the reason that inthis instance it is desirable'tohave a greater exterior diameter ofthebarrel than would be attained vif the metal were no thicker than wouldbe actually requisite in an ordinary pump-barrel of the same interiordiameter.v VThe exterior of this upper portion is turned oif truly.

C denotes one form of an auxiliary chamber, by means of which thewater-balance is effected. In Fig. l it is connected, by-means of itsdome and lauges, to the lower end of the reciprocating pipe B. It has aninterior diameter greater than the exterior diameter of the uppersection of the pum'p-barrel, and the sliding joint between them isguarded by a packingbox, as at b.

rIhe valve D is attached to the lower end of the valve-rod c, which,inturn, atits upper end is centrally secured to the interior of thedomev of the auxiliary chamber O,in a mauner well known. The usual lowervalve is shown at d. 4

E denotes a stationary tank, which is located at the mouth of thelshaft,or at any point below, from which direct drainage is possible.The bottom of the tankl is provided with a stuflng-box for packing withthe exterior surface of the pipe B, which is properly turned off andextends upward into the tank. The

pipe B, near its upper end, is vprovided with 1 numerous perforations,as at c, for discharging water laterally into the tank, which isprovided with an overow-chute, as at f. The upper end of pipe B isprovided with a suitable bale, as at g, with which the pitman isdirectly connected.

Under some circumstances I prefer that the upper section of pipe B bemade of wroughtiron or even low steel; but ordinarily good cast iron maybe employed.

In Fig. 1 the pipe B is'shown at the bottom, and in Fig. 2 at the top,of the stroke.A

It wil-l be readily seen that, as the pipe B is lifted, water will bedrawn through the lower valve into the pump .barrel; and,'also, that thewater in the upper portion ot" the pumpbarrel is lifted by the movingvalve. As the auxiliary chamber C is lifted, its cubic capacity israpidly enlarged, so that only a portion 0f it is filled by the waterlifted by the valve, and the remainder of said chamber is filled byWater from the pipe B. In other words, the column of water in pipe B(having its base in a chamber which is enlarged as the pipe rises)induces pressure within the chamber, which, when exerted upon its dome,contributes to the lift of the pipe and lessens the power otherwiserequisite to raise it; and it will also be seen, if the chamber beproperly proportioned with reference to the pump-barrel, the length ofstroke, and the pipe B, that the weight of said pipe may be practicallyoffset or balanced by the column of water within the pipe, and that,therefore, balancebobs,7 as in Cornish pumps, may be wholly obviated,or, if used at all, they may be reduced in weight to any desired degree.As the pipe B descends, the upper valve opens and water passes from thelower portion of the pumpbarrel, the cubic capacity of the auxiliarychamber meantime decreasing, and therefore at each descent of the pipeas much .water is discharged therefrom at its top as is taken into thepump'barrel through its lower valve, which is all that any pump whichoperates in forcing water only during the downward movement of itspiston could discharge.

In connection with the discharge ofthe wa-.

ter from the pipe B, it will be seen that it is delivered freely intothe open tank, because the numerousperforations afford an aggregate areaof opening much greater than the sectional area of the pipe. Asmining-pumps are usually ot' long stroke, it is a matter ofconsequenceto lessen, as far as is practicable, the

height ot' the column of water above the point' from which lowage mayoccur, and to discharge it with a minimum of pressure.

As before stated, the pump-barrel may be varied largely in itsconstruction, and the same is true of the auxiliary chamber, and thesevariations may be employed withoutdeparting from the spirit of myinvention.

In Fig. 3 I have illustrated a modication having an auxiliarywater-balance chamber,

- C, which is substantially as in Figs. 1 and 2.

The pump-barrel A is in -one piece, mounted on a valve-box. Instead ofavalve-rod a tubular piston, t', is employed, which, at the upper end,communicates with the pipe B, but has a greater interior diameter.Atlthe'upper end of piston fi it is provided with numerous perforations,k, which open into the water-balance chamber.

In Fig. 4 the tubular pistoni1 is;fpacked at its lower end, instead ofat the upper part of the pump-barrel A', as in Fig. 3. It is also of thesamediameter as the pipe B. 'Ihe packing between the pump-barrel and theauxiliary chamber is located at the top of the barrel, instead ofi atthe bottom .of .thetchambeg as in Fig. 3.

In Fig. 5 the pump-barrel is of the simplest possible form, and has atubularpiston, i". In this insta-nce the auxiliary or water-balancechamber G1 is wholly separate, as a structure, from the pumpbarrel.This, chamber is stationary, While those previously described have beenattached to, and move `with, the pipe B. The chamber and pump-barrelcommunicate with each other and with the pipe B by means of a branchpipe at l, which has for one leg the tubular piston 'i2 and the otherleg the pipe l', which occupies the water-balance chamber.

In Fig. 6 the pump-barrel is as in Fig.'5, but the stationarywater-balance chamberiG is located above, and the pipe B isstraight,extending from the pump upward through la stuffing box in the bottom ofsaid chamber. Said pipe within the chamber is provided with a piston, asat m, and below the piston the pipe is perforated.

'Ihis line of modification could be presented f by me almostindeiinitelyfrom plans which have long been prepared by me and dulyapproved; but I have shown a suicient number thereofto illustrate, tosomeextent, how far mere construction may be varied'without maf teriallyaffecting the results sought.

In connection with each form of pump herein shown,it will be seen thatas the pipe B is lifted the column of water therein is not lifted, andalso that said column contributes,by`its pressure upon the waterwithin'the balancechamber, to lift said pipe, and that, -by dueconsideration of the several points involved,

a 1 )ractically-per`fect balance of sai'd pipe may be attained in likemanner, as pump-rods have been heretofore balanced by balance-hubs, asin the Gornishpump.

The value in a mining-pump of the reciprocating pipe, in lieu of thestationary pipe and `pump-rods, has long been conceded, in that,

if for no other reason, less space is required in a shaft; and it willbe` seen that, withmy water-balance improvements, the moving pipes maybe employedlwithout the cumbrous balance-bobs heretofore deemedessential in deepmine pumps.

Having thus described my invention, I claim as new and desire to secureby these "Letters Patent- 1. In a mining-pump, the combination, with areciprocating pipe, a pump-barrel, and suitable valves, of an auxiliaryor water-balance its bottom for the passage of the pipe, subchamber,substantially as described, whereby stantially as described. the Weightof the pipe may be wholly or partially balanced, as set forth.

2. In a mining-pump having a reciprocat- Witnesses:

E. E. MGGAMMON, R. A. KEYES.

ELLSWORTH DAGGETT.

ing pipe, the combination, with said pipe, of a discharge-tank providedwith a stufIing-box in

